CN116093400A - A winding method with pre-rolling action and multi-station winding device - Google Patents

Abstract

The invention provides a winding method with a pre-winding action and a multi-station winding device, wherein the winding method with the pre-winding action comprises the following steps: the first conveying line conveys a first material belt to the material obtaining station; the winding mechanism at the winding station performs winding action, and the winding mechanism at the material obtaining station moves to a preparation position for butting with the first material belt; when the winding mechanism at the winding station completes the winding action, the winding mechanism at the material obtaining station obtains and cuts off the first material belt; when each winding mechanism on the winding line completes the action of the station where the winding mechanism is located, the winding mechanism moves to the downstream station; wherein the winding mechanism performs a pre-rolling operation when moving from the material-obtaining station to the winding station. The pre-winding action is parallel to the movement of the winding mechanism from the material obtaining station to the winding station, so that the initial winding of the battery cell can be started in the process of changing the working station, and the time consumption of the battery cell manufacturing process can be shortened by the winding method with the pre-winding action.

Description

A winding method with pre-rolling action and multi-station winding device

technical field

The invention relates to the field of electric core production, in particular to a winding method with pre-rolling action and a multi-station winding device.

Background technique

The winding process can be used to make the battery core. The winding machine generally includes multiple stations, and each station is responsible for different actions. In the current winding method, after the winding mechanism completes the action of the current station, the winding machine Control the winding mechanism to go to the next station, and the winding mechanism will proceed to the next part of the action after reaching the next station. The winding mechanism finally performs the unloading action at the unloading station to unload the battery, and then transfers to the initial station to retrieve the tape and start a new round of cycle.

The problem with the current winding method is that the entire winding process takes a part of the time for switching the winding mechanism between different stations, resulting in poor continuity of the winding process and difficulty in shortening the time.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention proposes a winding method with pre-rolling action and a multi-station winding device. The winding method with pre-rolling action can shorten the time consumption of the cell manufacturing process.

According to the winding method with pre-rolling action provided by the present invention, the winding method with pre-rolling action uses a winding line, a first conveying line and at least three winding mechanisms moving along the winding line, the winding The winding line is connected end to end, and the winding line includes a material obtaining station and a winding station, and the winding station is located downstream of the material obtaining station;

Winding methods with pre-roll action include:

The first conveying line conveys the first material belt to the material obtaining station;

The winding mechanism located at the winding station performs a winding action, and the winding mechanism located at the receiving station moves to a preparation position suitable for the first material tape;

When the winding mechanism at the winding station completes the winding action, the winding mechanism at the receiving station obtains and cuts off the first material tape;

After the winding mechanism at each station completes the action at the station, the winding mechanism moves to the downstream station;

Wherein, the winding mechanism performs a pre-rolling action when moving from the receiving station to the winding station.

According to the winding method with pre-rolling action provided by the present invention, at least has the following technical effects: by adding the pre-rolling action, the winding mechanism performs the pre-rolling action after obtaining the first material tape, and the pre-rolling action and the winding mechanism obtain the material The movement of the station to the winding station is parallel, so that the initial cell winding can be started during the process of changing stations, which shortens the time-consuming winding of the winding mechanism at the winding station, and has the advantages of pre-rolling The active winding method can shorten the time consumption of the cell manufacturing process.

According to some embodiments of the present invention, the winding line further includes a gluing station and an unloading station, and the winding mechanism located at the receiving station can pass through the winding station, the The gluing station and the blanking station return to the receiving station, and the winding method with pre-rolling action also includes:

The winding mechanism performs a finishing action when moving from the winding station to the gluing station;

When the winding mechanism moves to the gluing station, the gluing action is performed;

The unloading action is performed when the winding mechanism moves to the unloading station.

According to some embodiments of the present invention, the winding line further includes an unloading station, and the winding mechanism located at the receiving station can pass through the winding station and the unloading station in turn. To the receiving station, the winding method with pre-rolling action also includes:

After the winding mechanism completes the winding action, it performs the finishing action and the glue application action;

The unloading action is performed when the winding mechanism moves to the unloading station.

According to some embodiments of the present invention, the winding mechanism includes a winding needle, the winding needle includes a first needle body and a second needle body, and the winding mechanism moves to a ready position for docking with the first material tape This step includes:

The winding needle protrudes in the axial direction so that the first material tape passes between the first needle body and the second needle body;

Winding methods with preroll actions also include:

When the winding mechanism moves from the upstream station to the receiving station, the winding needle retracts axially to avoid the first material tape.

According to some embodiments of the present invention, the winding mechanism further includes a rotary cutter, the rotary cutter is located between the first needle body and the second needle body, the rotary cutter includes a blade and In the pressing part, the step of obtaining and cutting off the first material tape by the winding mechanism includes:

The rotary cutter rotates to make the pressing part close to the second needle body, and the pressing part and the second needle body press the first material tape;

The rotary cutter rotates to make the blade close to the first needle body, and the first needle body and the blade cut off the first material tape.

According to some embodiments of the present invention, the winding method with pre-rolling action uses the second conveying line, the winding method with pre-rolling action also includes:

The second conveying line transports the second material tape to the winding station, and the winding mechanism located at the winding station obtains the second material tape;

Obtaining a first offset, where the first offset refers to an offset of the second tape relative to the winding mechanism;

The movement of the winding mechanism is controlled to counteract the first offset.

The winding method with pre-rolling action provided by the present invention also has the following technical effects: after the winding mechanism of the receiving station obtains the first material tape, it performs the pre-rolling action during the process of moving to the winding station. In the process of reaching the winding station, it can also start to correct the deviation according to the deviation of the second material tape, adapt to the position of the second material tape, pre-rolling action, deviation correcting action and winding mechanism from the receiving station to the winding station The parallel movement shortens the time-consuming process of cell manufacturing.

According to some embodiments of the present invention, the first conveying line includes two diaphragm conveying units and a first pole piece conveying unit, and the step of conveying the first material belt to the material obtaining station by the first conveying line further includes :

The diaphragm conveying unit provides a diaphragm, and the first pole piece conveying unit provides the first pole piece;

Obtaining a second offset, where the second offset refers to the offset of the diaphragm relative to the first pole piece;

controlling movement of the diaphragm to counteract the second offset;

attaching the two diaphragms to both sides of the first pole piece to form the first strip;

The first material strip is sent to the material obtaining station.

According to some embodiments of the present invention, the step of sending the first material strip to the material obtaining station includes:

cutting the first strip;

sticking protective glue at the cut-off position to reconnect the first strip;

Sending the pasted first material tape to the material obtaining station;

Wherein, when pasting the protective glue, a gap is left between the two sections of the first material tape, and the cutting position in the step of obtaining and cutting the first material tape by the winding mechanism is consistent with the position of the gap .

According to the multi-station winding device provided by the present invention, it includes a winding line, a first conveying line and at least three winding mechanisms, the winding line is connected end to end, and the winding line includes a material obtaining station and a winding station, the winding station is located downstream of the receiving station, the first conveying line is used to convey the first material belt to the receiving station, and the winding mechanism can Move around the wire.

According to the multi-station winding device provided by the present invention, it has at least the following technical effects: the multi-station winding device can use the winding method with pre-rolling action provided by the present invention, so the preliminary winding can be started in the process of changing stations. The advanced cell winding shortens the time-consuming of the winding mechanism to wind the cell at the winding station, and the multi-station winding device can shorten the time-consuming of the cell manufacturing process.

According to some embodiments of the present invention, the winding line further includes a gluing station and an unloading station, and the winding mechanism can pass through the receiving station, the winding station, the pasting station, and the pasting station in sequence. The gluing station and the unloading station return to the receiving station, and a finishing mechanism for finishing is installed between the winding station and the gluing station, and the gluing station is installed to be useful Gluing mechanism for gluing.

According to some embodiments of the present invention, the winding line further includes a blanking station, and the winding mechanism can pass through the receiving station, the winding station, and the blanking station in sequence to return to The material receiving station and the winding station are equipped with a finishing and gluing mechanism for finishing and gluing.

According to some embodiments of the present invention, the first conveying line includes two diaphragm conveying units and a first pole piece conveying unit, the diaphragm conveying unit is used to provide the diaphragm, and the first pole piece conveying unit is used to provide For the first pole piece, the first conveying line can attach the two diaphragms to both sides of the first pole piece to form the first strip.

According to some embodiments of the present invention, the first conveying line includes a pre-cutting station for cutting the first strip, and the pre-cutting station is used for A gap is formed at the cut position of the tape and a protective glue is applied.

According to some embodiments of the present invention, the winding mechanism includes a rolling needle and a rotary cutter, the rolling needle includes a first needle body and a second needle body, and the first needle body and the second needle body are used for For clamping the first material tape, the rotary cutter is located between the first needle body and the second needle body, the rotary cutter includes a blade and a pressing portion, and the blade and The first needle body is adapted, the pressing part is adapted to the second needle body, the rotary cutter can rotate so that the blade cuts off the first strip, and the rotating The cutter can be rotated so that the pressing part presses the first material strip.

According to some embodiments of the present invention, the multi-station winding device further includes a second conveying line, the second conveying line is used to convey the second material tape to the winding station, and the winding mechanism can stretching along the axis direction to correct the deviation of the second material tape.

Description of drawings

The above-mentioned and/or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings. Obviously, the drawings in the following description are only some embodiments of the application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a schematic diagram of an embodiment of a multi-station winding device of the present invention;

Fig. 2 is a schematic diagram of another embodiment of the multi-station winding device of the present invention;

3 is a schematic diagram of the winding mechanism of the present invention when performing a winding method with a pre-rolling action;

4 is a schematic diagram of the winding mechanism of the present invention when performing a winding method with a pre-rolling action;

5 is a schematic diagram of the winding mechanism of the present invention when performing a winding method with a pre-rolling action;

6 is a schematic diagram of the winding mechanism of the present invention when performing a winding method with a pre-rolling action;

7 is a schematic diagram of the winding mechanism of the present invention when performing a winding method with a pre-rolling action;

8 is a schematic diagram of the winding mechanism of the present invention when performing a winding method with a pre-rolling action;

Fig. 9 is a flow chart of the action of the winding mechanism of the present invention;

Fig. 10 is a schematic structural view of the rotary cutter of the present invention.

Reference signs:

Winding mechanism 110, first needle body 111, second needle body 112, blade portion 113, pressing portion 114, finishing mechanism 120, gluing mechanism 130, finishing gluing mechanism 140,

The first strip 210, the diaphragm 211, the first pole piece 212, the second strip 220,

Receiving station 310, winding station 320, gluing station 330, unloading station 340, laminating station 360, pre-cutting station 370.

Detailed ways

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientation or position relationship are based on the orientation or position relationship shown in the drawings, It is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, several means one or more, and multiple means two or more. Greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number. The terms "first", "second", "third" and "fourth" are used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or Implicitly indicates the sequence of the indicated technical features. The terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

According to the winding method with pre-rolling action provided by the present invention, the winding method with pre-rolling action uses a winding line, a first conveying line and at least three winding mechanisms 110 moving along the winding line. Connected, the winding line includes a material obtaining station 310 and a winding station 320, and the winding station 320 is located at the downstream of the obtaining material station 310;

Winding methods with pre-roll action include:

The first conveying line conveys the first material belt 210 to the receiving station 310;

The winding mechanism 110 located at the winding station 320 performs a winding action, and the winding mechanism 110 located at the receiving station 310 moves to a preparation position suitable for the first material tape 210;

When each winding mechanism 110 on the winding line completes the winding action, the winding mechanism 110 located at the material obtaining station 310 acquires and cuts off the first material tape 210;

After the winding mechanism 110 at each station completes the action at the station, the winding mechanism 110 moves to the downstream station;

Wherein, the winding mechanism 110 performs a pre-rolling action when moving from the receiving station 310 to the winding station 320 .

In the current winding method, different actions are connected in series. When the winding mechanism 110 switches between different stations, the winding mechanism 110 does not perform other actions except for moving.

The pre-rolling action refers to the rotation of the winding mechanism 110 so that the first material tape 210 is wound on the winding mechanism 110 in advance. According to the winding method with the pre-rolling action provided by the present invention, by adding the pre-rolling action, the pre-rolling action and the winding The movement of the winding mechanism 110 from the material receiving station 310 to the winding station 320 is parallel, so that the preliminary cell winding can be started during the station change process, which shortens the time for the winding mechanism to perform cell winding at the winding station. The time-consuming winding, the winding method with pre-rolling action can shorten the time-consuming of the cell manufacturing process.

It can be understood that the current winding mechanism 110 moves to the winding station 320 with the first material tape 210 for winding, and when the current winding mechanism 110 completes the winding action, the next winding mechanism 110 will again The material obtaining station 310 cuts off the first material tape 210 , so as to realize connection and circulation between different winding mechanisms 110 . When the winding mechanism 110 of the receiving station 310 cuts off the first strip 210, the winding mechanism 110 of the winding station 320 suspends winding, and resumes winding immediately after the cutting is completed.

The manufacturing process of the battery cell also includes the closing action, the glue application action and the unloading action. The closing action refers to pressing the end of the battery core to prevent the rolled battery core from being scattered, and at the same time the winding mechanism 110 continues to rotate for winding. At the end of the battery cell, the glue sticking action refers to putting glue on the end of the finished battery cell to prevent the rolled battery core from falling apart, and the unloading action refers to removing the battery core from the winding mechanism 110 . Wherein, the action of finishing the cell should be earlier than the action of cutting off the first material tape 210 by the next winding mechanism 110 . According to the specific design, the winding action, finishing action, gluing action and unloading action can be carried out at the same station or at different stations.

In some embodiments, the winding line also includes a gluing station 330 and an unloading station 340, and the winding mechanism 110 located at the receiving station 310 can pass through the winding station 320, the gluing station 330 and the lowering station in sequence. The material station 340 returns to the receiving station 310, and the winding method with pre-rolling action also includes:

When the winding mechanism 110 moves from the winding station 320 to the gluing station 330, it performs a finishing action;

When the winding mechanism 110 moves to the gluing station 330, the gluing action is performed;

The unloading action is performed when the winding mechanism 110 moves to the unloading station 340 .

By parallelizing the finishing action with the movement of the winding mechanism 110 from the winding station 320 to the gluing station 330 , the winding method with the pre-rolling action can further shorten the time consumption of the cell manufacturing process.

In some other embodiments, the winding line also includes a blanking station 340, and the winding mechanism 110 located at the receiving station 310 can return to the receiving station 310 through the winding station 320 and the blanking station 340 in sequence. , the winding method with preroll action also includes:

After the winding mechanism 110 completes the winding action, it performs the finishing action and glue application action;

The unloading action is performed when the winding mechanism 110 moves to the unloading station 340 .

By integrating the winding action, finishing action and gluing action into the winding station, the time for the winding mechanism 110 to move from the winding station 320 to the gluing station 330 can be saved, thereby further shortening the cell manufacturing process time-consuming.

According to some embodiments of the present invention, the winding mechanism 110 includes a winding needle, and the winding needle includes a first needle body 111 and a second needle body 112, and the winding mechanism 110 moves to the preparation position docked with the first material tape 210. include:

The winding needle protrudes toward the direction of the first material tape 210 so that the first material tape 210 passes between the first needle body 111 and the second needle body 112;

Winding methods with preroll actions also include:

When the winding mechanism 110 moves from the upstream station to the receiving station 310 , the winding needle retracts away from the first material tape 210 to avoid the first material tape 210 .

Here, there are many ways to move away from the first material strip 210, that is, the avoidance movement of the first material belt 210, for example, the first needle body 111 and the second needle body 112 are turned outward, the first needle body 111 and the second needle body 112 are folded, the first needle body 111 and the second needle body 112 are retracted along the axial direction of the rolling needle, and so on.

The avoidance of the winding mechanism 110 can prevent the winding mechanism 110 from interfering with the last winding mechanism 110 at the winding station 320 to wind the first material tape 210 when moving to the material obtaining station 310, so that the winding mechanism 110 moves to the receiving station 310. The movement of the material obtaining station 310 can be performed in parallel with the process of winding the first material tape 210 by the previous winding mechanism 110 , so that the time consumption of the cell manufacturing process can be further shortened. Similarly, the process of moving the winding mechanism 110 to the preparation position compatible with the first material strip 210 can also be performed in parallel with the process of winding the first material strip 210 by the previous winding mechanism 110, so that the battery cell can be further shortened. Time-consuming production process.

In some embodiments, the winding mechanism 110 further includes a rotary cutter, the rotary cutter is located between the first needle body 111 and the second needle body 112, the rotary cutter includes a blade portion 113 and a pressing portion 114, and the winding mechanism 110 obtaining and cutting off the first material tape 210 this step includes:

The rotary cutter rotates so that the pressing part 114 is close to the second needle body 112, and the pressing part 114 and the second needle body 112 press the first strip 210;

The rotary cutter rotates so that the blade portion 113 is close to the first needle body 111 , and the first needle body 111 and the blade portion 113 cut off the first material tape 210 .

Referring to FIG. 10 , the first needle body 111 includes a fixed cutting edge, and the second needle body 112 includes a pressing block. First, the pressing part 114 and the pressing block press the first strip 210 to limit the first strip 210. position to avoid movement of the first material strip 210 during cutting, and then the blade portion 113 and the fixed cutting edge work together to cut off the first material strip 210 . By placing the rotary cutter inside the winding needle, the volume of the winding mechanism 110 can be effectively reduced, which helps to make the layout of the winding wire more compact. At the same time, there is a cavity in the middle of the rotary cutter, which can be used as The flow channel for blowing or sucking dust increases the cross-sectional area of the flow channel, and the dust removal effect is better than that of the traditional linear cutter. The pressing part 114 and/or the pressing block are elastic to avoid rigid contact, thereby reducing damage to the first material strip 210 during pressing. At the same time, the pressing part 114 and/or the pressing block are deformed along with the rotation of the rotary cutter, so as to avoid hindering the movement of the blade part 113 .

According to some embodiments of the present invention, the winding method with pre-rolling action uses the second conveying line, the winding method with pre-rolling action also includes:

The second conveying line conveys the second strip 220 to the winding station 320;

Wherein, the first material strip 210 includes a first pole piece 212 , and the second material strip 220 includes a second pole piece.

When winding, referring to Fig. 1 and Fig. 2, the second material tape 220 is sent in from the tangent point position of the first material tape 210 winding, and as the winding progresses, the first material tape 210 will wrap the second material tape 220 Clamping, thereby realizing the acquisition of the second material strip 220 .

The cell includes a cathode sheet, an anode sheet, and a diaphragm for separating the cathode sheet and the anode sheet. In the existing winding method, the cathode sheet, the anode sheet, and the two diaphragms need to be laminated before being sent to the winding mechanism 110. After cutting, the sheet and anode sheets are sent to the film laminating position by their respective sheet feeding mechanisms, and the sheet feeding mechanism will correct the deviation according to the offset when feeding the cathode sheet and when feeding the anode sheet. Due to the long conveying route of the cathode sheet and the anode sheet during the feeding process, the sheet feeding mechanism is far away from the film laminating position and the winding position, there is a delay in the deviation correction and the response is not in place, and the deviation correction of the two sheet feeding mechanisms is still possible. Interference with each other, so the existing winding method has the problem of poor alignment of the cathode sheet, the anode sheet, and the edges on both sides of the separator, resulting in poor winding of the completed cell.

In the winding method with pre-rolling action of the present invention, first the first material tape 210 is sent to the winding mechanism 110, then the second material tape 220 is sent to the winding mechanism 110, and then the second material tape 220 is sent to the winding mechanism 110, and then the second material tape 220 is sent to the winding mechanism At 220, since the first material tape 210 is already in the state of being wound at this time, the stability and controllability are better, and the first material tape 210 can be controlled according to the offset of the second material tape 220 to carry out the deviation correction action, so The offset when feeding into the second material strip 220 is easy to adjust and correct, and it is easy to improve the quality of battery winding.

It can be understood that at this time, the first material strip 210 includes the first pole piece 212, the second material strip 220 includes the second pole piece, and one of the first pole piece 212 and the second pole piece is an anode piece, and the other is an anode piece. is the cathode sheet.

The deviation correction can be realized specifically through the movement of the winding mechanism 110 .

In some embodiments, the winding method with pre-rolling action also includes:

Obtaining a first offset, where the first offset refers to the offset of the second tape 220 relative to the winding mechanism 110;

The movement of the winding mechanism 110 is controlled to counteract the first offset.

Specifically, the first offset may be obtained by means of components such as a CCD or a sensor. Since the deviation correction is directly performed by the winding mechanism 110 at this time, the deviation correction position coincides with the winding position, and the winding mechanism 110 clamps the first material tape 210 to perform deviation correction according to the offset of the second material tape 220, so that the first material tape 210 is adapted to the incoming position of the second material tape 220, so as to ensure the alignment of the edges on both sides of the second material tape 210 and the first material tape 220, so it can solve the problems of deviation correction lag and insufficient deviation correction response, and improve the quality of the battery cell.

At the same time, after the winding mechanism 110 clamps the first material tape 210 , the winding mechanism 110 can start to correct the deviation to prepare to obtain the second material tape 220 . That is to say, the deviation correcting action and the pre-rolling action of the winding mechanism 110 can be performed in parallel.

According to some embodiments of the present invention, the first conveying line includes two diaphragm conveying units and a first pole piece conveying unit, and the step of conveying the first material belt 210 to the material obtaining station 310 by the first conveying line further includes:

The diaphragm delivery unit provides a diaphragm 211, and the first pole piece delivery unit provides a first pole piece 212;

Obtaining a second offset, where the second offset refers to the offset of the diaphragm 211 relative to the first pole piece 212;

controlling the movement of the diaphragm 211 to counteract the second offset;

Attaching two diaphragms 211 to both sides of the first pole piece 212 to form the first strip 210;

The first material strip 210 is sent to the receiving station 310 .

It can be understood that, in some current schemes, a pole piece is bonded to a diaphragm 211, and the thickness of the material strip obtained after the lamination is relatively thin, and the ability to resist deformation is weak; in some current schemes, the pole piece needs to be Cutting is carried out by the sheet feeding mechanism, and then sent between the diaphragms, the thickness of the electrode sheet is thinner after sheet feeding and cutting, and the ability to resist deformation is weak. The head and tail of the pole piece are prone to offset, resulting in poor alignment between the pole piece and the diaphragm. In addition, the edge of the pole piece is prone to uneven force and wrinkling during the transportation process, which affects the quality of the cell winding .

In some embodiments of the present invention, the thickness of the first material strip 210 and the ability to resist deformation are improved by laminating the two separators 211 and the first pole piece 212, and it is not easy to wrinkle during transportation, and the winding with pre-rolling action The method can improve the continuity of the battery core winding process, thereby helping to improve the efficiency of the winding process. Since the second material tape 220 is fed in during winding, the conveying distance is relatively short, and the risk of wrinkling during conveying is relatively low.

The beneficial effect of the present invention is also that the present invention cancels the film-combining step in the prior art, so that the diaphragm 211 does not participate in the film-combining, and shortens the length of the diaphragm 211 at the head and tail; meanwhile, it also cancels a set of existing winding equipment The film feeding mechanism, the first material belt 210 is loaded through the acquisition and traction of the winding mechanism 110, which ensures the position accuracy of the first material belt 210; The winding of the material tape 220 can eliminate the unbonded first pole piece 212 in the prior art, which is prone to offset at the head and tail of the pole piece after feeding and cutting, resulting in the alignment of the first pole piece 212 and the diaphragm 211 To solve the problem of poor degree, the alignment degree between the first pole piece 212 and the diaphragm 211 can be improved.

In some embodiments, the step of sending the first strip 210 to the harvesting station 310 includes:

cutting off the first strip 210;

Paste protective glue on the cut position to reconnect the first strip 210;

Send the pasted first material tape 210 to the material obtaining station;

Wherein, a gap is left between two sections of the first material tape 210 when pasting the protective glue, and the cutting position in the step of obtaining and cutting the first material tape 210 by the winding mechanism 110 is consistent with the position of the gap.

In some current winding methods, in order to prevent the cutting chips and burrs generated when the winding mechanism 110 cuts off the first material strip 210 from piercing the diaphragm 211 or the first pole piece 212, and to avoid contamination of the winding mechanism 110 by cutting chips, The position is pasted with protective glue first and then cut off, so that the generated chips and burrs will be stuck by the protective glue, and will not pierce the diaphragm 211 or the first pole piece 212 during subsequent winding. However, this method still produces chips and burrs, and there are still certain risks.

Some embodiments of the present invention cut off the first material belt 210 in advance by adding a pre-cutting link in the process of conveying the first material belt 210. When the winding mechanism 110 cuts off, it only needs to cut the protective glue from the gap position, so the winding mechanism 110 When cutting, the diaphragm 211 or the first pole piece 212 will not be cut into, which avoids cutting chips of the diaphragm 211 or the first pole piece 212 during the second cutting. In addition, the pre-cutting link is cut first and then the protective glue is applied, so the chips generated during cutting will stay on the first conveying line, and the burrs generated will be stuck by the protective glue, which will not easily affect the subsequent winding.

In some embodiments, when the second conveying line transports the second material tape 220 , the second material tape 220 may also be pasted with protective glue, and then the second material tape 220 is cut off after pasting.

The multi-station winding device provided according to the present invention includes a winding line, a first conveying line and at least three winding mechanisms 110 moving along the winding line, the winding line is connected end to end, and the winding line includes a material receiving station 310 and the winding station 320, the winding station 320 is located at the downstream of the receiving station 310, the first conveying line is used to transport the first strip 210 to the receiving station 310, and the winding mechanism 110 can move along the winding line move.

The multi-station winding device provided by the present invention can be used to implement the winding method with pre-rolling action provided by the present invention, so the initial cell winding can be started during the process of changing stations, shortening the winding mechanism 110 It takes time to wind the cell at the winding station 320 , and the multi-station winding device can shorten the time-consuming process of manufacturing the cell.

In some embodiments, the winding line also includes a gluing station 330 and a blanking station 340, and the winding mechanism 110 can pass through the receiving station 310, the winding station 320, the gluing station 330 and the blanking station in sequence. The station 340 returns to the receiving station 310, and the finishing mechanism 120 for finishing is installed between the winding station 320 and the gluing station 330, and the gluing mechanism 130 for gluing is installed at the gluing station 330.

In some embodiments, the winding line also includes an unloading station 340, and the winding mechanism 110 can return to the unloading station 310 through the receiving station 310, the winding station 320 and the unloading station 340 in sequence, and the winding A finishing gluing mechanism 140 for finishing and gluing is installed around the station 320 .

In some embodiments, the first conveying line includes two diaphragm conveying units and a first pole piece conveying unit, the diaphragm conveying unit is used to provide the diaphragm 211, the first pole piece conveying unit is used to provide the first pole piece 212, and the first pole piece conveying unit is used to provide the first pole piece 212. A conveying line can attach two diaphragms 211 to both sides of the first pole piece 212 to form the first strip 210 .

In some embodiments, the first conveying line includes a pre-cutting station 370, the pre-cutting station 370 is used to cut off the first strip 210, the pre-cutting station 370 is used to form a gap at the cutting position of the first strip 210 and Paste the protective glue.

In some embodiments, the winding mechanism 110 includes a winding needle and a rotary cutter, the winding needle includes a first needle body 111 and a second needle body 112, and the first needle body 111 and the second needle body 112 are used to clamp the first needle body 111 and the second needle body 112. Material strip 210, the rotary cutter is located between the first needle body 111 and the second needle body 112, the rotary cutter includes a blade portion 113 and a pressing portion 114, the blade portion 113 is adapted to the first needle body 111, and is compressed The part 114 is adapted to the second needle body 112 , the rotary cutter can rotate so that the blade part 113 cuts off the first material strip 210 , and the rotary cutter can rotate so that the pressing part 114 can compress the first material strip 210 .

In some embodiments, the multi-station winding device further includes a second conveying line, the second conveying line is used to convey the second material tape 220 to the winding station 320, and the winding mechanism 110 can expand and contract along the axial direction to The second material belt 220 is corrected.

The multi-station winding device also includes corresponding functional modules and beneficial effects for executing the winding method with pre-rolling action provided by any embodiment of the present invention. For technical details not exhaustively described in the above-mentioned embodiments, reference may be made to the winding method with pre-rolling action provided in any embodiment of the present application.

The winding method with pre-rolling action and the multi-station winding device according to the present invention will be described in detail below with reference to FIGS. 1 to 10 in two specific embodiments. It should be explained that, in FIGS. 3 to 8 , the winding mechanism 110 drawn with a dotted line and the winding mechanism 110 drawn with a solid line indicate that the two are located on different planes, so that the winding mechanism 110 is spatially connected to the first material. Take 210 to stagger. It should be understood that the following description is only an illustration rather than a specific limitation to the invention.

Example 1:

Referring to FIG. 1 and FIG. 10 , the multi-station winding device includes a turret, a first conveying line, a second conveying line and four winding mechanisms 110 .

A circular winding line is formed on the turret, and the winding line includes a receiving station 310, a winding station 320, a gluing station 330 and a blanking station 340 arranged in sequence, the winding station 320 and the pasting station A finishing mechanism 120 is installed between the gluing stations 330, a gluing mechanism 130 is installed at the gluing station 330, and a blanking mechanism is installed at the unloading station 340.

The first conveying line includes a first material preparation station, a bonding station 360 and a pre-cutting station 370 arranged in sequence, and the first material preparation station includes two diaphragm conveying units and a first pole piece conveying unit. The second conveying line includes a second material preparation station and a cutting station arranged in sequence, and the second material preparation station includes a second pole piece conveying unit.

The turret can rotate so that the winding mechanism 110 can move circularly along the winding line. The winding mechanism 110 includes a winding needle and a rotary cutter. The winding mechanism 110 can rotate along its own axis, and the winding mechanism 110 can extend or retract . The rolling needle includes a first needle body 111 and a second needle body 112, the first needle body 111 and the second needle body 112 are used to clamp the first material tape 210, and the rotary cutter is located at the first needle body 111 and the second needle body Between 112 , the rotary cutter includes a blade portion 113 and a pressing portion 114 , the blade portion 113 is adapted to the first needle body 111 , and the pressing portion 114 is adapted to the second needle body 112 .

Referring to Figure 3 to Figure 9, use the multi-station winding device according to the following winding method with pre-rolling action:

The first conveying line conveys the first material belt 210 to the receiving station 310, and the second conveying line conveys the second material belt 220 to the winding station 320;

The winding mechanism 110 located at the winding station 320 performs a winding action;

The winding mechanism 110 located at the material obtaining station 310 moves to the preparation position docked with the first material belt 210;

When the winding mechanism 110 moves to the gluing station 330, the gluing action is performed;

When the winding mechanism 110 moves to the blanking station 340, the blanking action is performed;

When the winding mechanism 110 at the winding station 320 completes the winding action, the winding mechanism 110 at the receiving station 310 obtains and cuts off the first material tape 210;

After each winding mechanism 110 on the winding line completes the action of the current station, the winding mechanism 110 located at the receiving station 310 moves to the winding station 320, and the winding mechanism 110 located at the winding station 320 Move to the gluing station 330, the winding mechanism 110 positioned at the gluing station 330 moves to the lower material station 340, and the winding mechanism 110 positioned at the blanking station 340 moves to the receiving station 310;

The winding mechanism 110 performs a pre-rolling action when moving from the receiving station 310 to the winding station 320;

When the winding mechanism 110 moves from the winding station 320 to the gluing station 330, it performs a finishing action;

When the winding mechanism 110 moves from the unloading station 340 to the receiving station 310, the winding needle retracts axially to avoid the first material tape 210, obtains the first offset, and controls the movement of the winding mechanism 110 to offset the first offset. Offset.

Wherein, the first offset refers to the offset of the second tape 220 relative to the winding mechanism 110 .

The step of moving the winding mechanism 110 to the ready position docked with the first material tape 210 includes:

The rolling pins protrude in the axial direction so that the first material tape 210 is placed between the first pin body 111 and the second pin body 112 .

The step that the winding mechanism 110 obtains and cuts off the first material tape 210 includes:

The rotary cutter rotates so that the pressing part 114 is close to the second needle body 112, and the pressing part 114 and the second needle body 112 press the first strip 210;

The rotary cutter rotates so that the blade portion 113 is close to the first needle body 111 , and the first needle body 111 and the blade portion 113 cut off the first material tape 210 .

The step of transporting the first material belt 210 to the receiving station 310 by the first conveying line also includes:

The diaphragm delivery unit provides a diaphragm 211, and the first pole piece delivery unit provides a first pole piece 212;

Get the second offset;

controlling the movement of the diaphragm 211 to counteract the second offset;

Wherein, the second offset refers to the offset of the diaphragm 211 relative to the first pole piece 212 .

Attaching two diaphragms 211 to both sides of the first pole piece 212 to form the first strip 210;

cutting off the first strip 210;

Paste protective glue on the cut position to reconnect the first strip 210;

Send the pasted first material tape 210 to the material obtaining station;

Wherein, a gap is left between two sections of the first material tape 210 when pasting the protective glue, and the cutting position in the step of obtaining and cutting the first material tape 210 by the winding mechanism 110 is consistent with the position of the gap.

Example 2:

Referring to Figure 2, the difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 integrates the winding action, finishing action and glue application into the winding station 320, and the winding line also includes a blanking station 340. The winding mechanism 110 can return to the receiving station 310 through the receiving station 310, the winding station 320 and the unloading station 340 in sequence, and the winding station 320 is equipped with a finishing glue-applying mechanism 140 for finishing and pasting. In addition, in Embodiment 2, the rotary cutter of the winding mechanism 110 is replaced with an external cutter. When the winding mechanism 110 is stretched out and retracted, the external cutter and the winding needle expand and contract separately, and the external cutter can retract first after cutting the first material strip 210 .

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (15)

1. A winding method with a pre-winding action, characterized by:

the winding method with the pre-winding action uses a winding wire, a first conveying line and at least three winding mechanisms moving along the winding wire, wherein the winding wire is connected end to end, the winding wire comprises a material obtaining station and a winding station, and the winding station is positioned at the downstream of the material obtaining station;

The winding method with the pre-winding action comprises the following steps:

the first conveying line conveys a first material belt to the material obtaining station;

the winding mechanism positioned at the winding station performs winding action, and the winding mechanism positioned at the material obtaining station moves to a preparation position matched with the first material belt;

when the winding mechanism at the winding station completes the winding action, the winding mechanism at the material obtaining station obtains and cuts off the first material belt;

after each winding mechanism on the winding line completes the action of the station where the winding mechanism is located, the winding mechanism moves to the downstream station;

the winding mechanism performs pre-rolling when moving from the material obtaining station to the winding station.

2. The winding method with pre-winding action according to claim 1, wherein the winding wire further comprises a rubberizing station and a blanking station, the winding mechanism at the material obtaining station is capable of returning to the material obtaining station through the winding station, the rubberizing station and the blanking station in sequence, and the winding method with pre-winding action further comprises:

the winding mechanism performs ending actions when moving from the winding station to the rubberizing station;

The winding mechanism performs rubberizing action when moving to the rubberizing station;

and the winding mechanism performs a blanking action when moving to the blanking station.

3. The winding method with pre-winding action according to claim 1, characterized in that: the winding line further comprises a blanking station, the winding mechanism positioned at the material obtaining station can sequentially pass through the winding station and the blanking station to return to the material obtaining station, and the winding method with the pre-winding action further comprises the following steps:

the winding mechanism performs ending and rubberizing actions after finishing winding actions;

and the winding mechanism performs a blanking action when moving to the blanking station.

4. The method of claim 1, wherein the winding mechanism comprises a winding needle comprising a first needle and a second needle, the step of moving the winding mechanism to a ready position for interfacing with the first web comprises:

the winding needle extends out along the axial direction so that the first material belt passes through the space between the first needle body and the second needle body;

the winding method with the pre-winding action further comprises:

when the winding mechanism moves from an upstream station to the material obtaining station, the winding needle is axially retracted to avoid the first material belt.

5. The method of claim 4, wherein the winding mechanism further comprises a rotary cutter located between the first needle and the second needle, the rotary cutter comprising a blade portion and a pinch portion, the step of the winding mechanism capturing and severing the first web comprising:

the rotary cutter rotates to enable the pressing part to be close to the second needle body, and the pressing part and the second needle body press the first material belt;

the rotary cutter rotates to enable the blade part to be close to the first needle body, and the first needle body and the blade part cut off the first material belt.

6. The winding method with a pre-winding action according to claim 1, characterized in that the winding method with a pre-winding action uses a second conveyor line, the winding method with a pre-winding action further comprising:

a second conveying line conveys a second material belt to the winding station, and the winding mechanism positioned at the winding station acquires the second material belt;

acquiring a first offset, wherein the first offset refers to the offset of the second material belt relative to the winding mechanism;

the winding mechanism motion is controlled to counteract the first offset.

7. The winding method with pre-winding action according to claim 6, wherein said first conveyor line comprises two separator conveying units and a first pole piece conveying unit, the step of conveying a first strip of material to said obtaining station by the first conveyor line further comprising:

the diaphragm conveying unit provides a diaphragm, and the first pole piece conveying unit provides the first pole piece;

acquiring a second offset, wherein the second offset refers to the offset of the diaphragm relative to the first pole piece;

controlling the diaphragm movement to counteract the second offset;

attaching two diaphragms to two sides of the first pole piece respectively to form a first material belt;

and conveying the first material belt to the material obtaining station.

8. The winding method with pre-winding action according to claim 7, characterized in that the step of feeding the first web to the obtaining station comprises:

cutting off the first material belt;

sticking a protective adhesive at the cutting position to reconnect the first material belt;

sending the stuck first material belt to a material obtaining station;

and when the protective adhesive is adhered, a gap is reserved between two sections of the first material belt, and the cutting position of the winding mechanism in the step of obtaining and cutting the first material belt is consistent with the position of the gap.

9. A multi-station winding apparatus, comprising:

the winding device comprises a winding wire, wherein the winding wire is connected end to end, the winding wire comprises a material obtaining station and a winding station, and the winding station is positioned at the downstream of the material obtaining station;

the first conveying line is used for conveying a first material belt to the material obtaining station;

at least three winding mechanisms movable along the winding line.

10. The multi-station winding apparatus of claim 9, wherein: the winding line further comprises a rubberizing station and a blanking station, the winding mechanism can sequentially pass through the material obtaining station, the winding station, the rubberizing station and the blanking station to return to the material obtaining station, a tail-ending mechanism for ending is arranged between the winding station and the rubberizing station, and the rubberizing station is provided with a rubberizing mechanism for rubberizing.

11. The multi-station winding apparatus of claim 9, wherein: the winding line further comprises a blanking station, the winding mechanism can sequentially pass through the material obtaining station, the winding station and the blanking station to return to the material obtaining station, and the winding station is provided with a tail-ending rubberizing mechanism for tail-ending and rubberizing.

12. The multi-station winding apparatus of claim 9, wherein: the first conveying line comprises two diaphragm conveying units and a first pole piece conveying unit, the diaphragm conveying units are used for providing diaphragms, the first pole piece conveying units are used for providing first pole pieces, and the first conveying line can respectively attach two diaphragms to two sides of the first pole pieces to form a first material belt.

13. The multi-station winding apparatus of claim 12, wherein: the first conveying line comprises a pre-cutting station, the pre-cutting station is used for cutting off the first material belt, and the pre-cutting station is used for forming a gap at the cutting position of the first material belt and pasting protective glue.

14. The multi-station winding apparatus of claim 9, wherein: the winding mechanism comprises a winding needle and a rotary cutter, the winding needle comprises a first needle body and a second needle body, the first needle body and the second needle body are used for clamping the first material belt, the rotary cutter is located between the first needle body and the second needle body, the rotary cutter comprises a blade part and a pressing part, the blade part is matched with the first needle body, the pressing part is matched with the second needle body, the rotary cutter can rotate to enable the blade part to cut off the first material belt, and the rotary cutter can rotate to enable the pressing part to press the first material belt.

15. The multi-station winding apparatus of claim 9, wherein: the multi-station winding device further comprises a second conveying line, the second conveying line is used for conveying a second material belt to the winding station, and the winding mechanism can stretch and retract along the axis direction so as to correct the deviation of the second material belt.

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